Universal coupler



FIG. 1 is a front view of a universal coupler.

FIG. 2 is a side view of the universal coupler of FIG. 1, wherein the opposite side view is a mirror image thereof.

FIG. 3 is a back view of the universal coupler of FIG. 1.

FIG. 4 is a top view of the universal coupler of FIG. 1; and,

FIG. 5 is a bottom view of the universal coupler of FIG. 1.

In the drawings, the broken lines in FIGS. 1, 2 and 5 depict portions of the article that form no part of the claim. 

CLAIM The ornamental design for a universal coupler, as shown and described. 